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TLS Online TPP Program

#Question id: 11211

The following steps refer to various stages in transmission at a chemical synapse.


1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.


2. Calcium ions rush into neuron's cytoplasm.


3. An action potential depolarizes the membrane of the presynaptic axon terminal.


4. The ligand-gated ion channels open.


5. The synaptic vesicles release neurotransmitter into the synaptic cleft.


Which sequence of events is correct?

#Unit 7. System Physiology – Animal
  1. 1 → 2 → 3 → 4 → 5
  2. 2 → 3 → 5 → 4 → 1
  3. 3 → 2 → 5 → 1 → 4

  4. 4 → 3 → 1 → 2 → 5

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TLS Online TPP Program

#Question id: 26790

#Unit 8. Inheritance Biology

 Assuming that the A, B, C and D genes are not linked, the probability of a progeny being AaBBccDd from a cross between AABbccDd and aaBBccDD parents will be 
TLS Online TPP Program

#Question id: 26791

#Unit 8. Inheritance Biology

There are four genes which control the phenotype and assort independently such as A, B, C and D. If the genotype Aa Bb Cc Dd is selfed then what is the probability for progeny which shows the dominant phenotype for AT LEAST ONE of  phenotypes controlled by

genes A, B,  C and D? 
TLS Online TPP Program

#Question id: 26792

#Unit 8. Inheritance Biology

If an F1 plant (Rr) is backcrossed to the parent with round seeds and wrinkled seed, what proportion of the progeny will have wrinkled seeds from both?
TLS Online TPP Program

#Question id: 26793

#Unit 8. Inheritance Biology

The probability of rolling one die and obtaining a four. To calculate the probability of rolling a die twice and obtaining 2 fours, What is the probability of rolling a four on both is?
TLS Online TPP Program

#Question id: 26794

#Unit 8. Inheritance Biology

Genes are located close together on the same chromosome are called__
TLS Online TPP Program

#Question id: 26803

#Unit 8. Inheritance Biology

In some sheep, the presence of beard is produced by an autosomal allele that is dominant in males and recessive in females. A beard female is crossed with a homozygous beardless male. One of the resulting F1 females is crossed with a beardless male. What proportion of the male and female progeny from this cross will have beard in F2 generation?